Wrapping machine



sept. 15, 1925;

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Patented Sept.Y 15, 1925.

f UNITED STATES marisa PATENT OFFICE.

FRANK E. BEAM, 0F TOLEDO, OHIO, ASSIGNOR TO THE AUTOMAT HOLDING di: FOLDING COMPANY, OF TOLEDO, OHIO, A CORQPORATION OF OHIO.

WRAPPING MACHINE.

Application led .Tune 9, 1922. Serial No. 566,929.

To all whom it 'may concern.'

Be it known thatI, FRANK E. BEAM, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio', have made an Invention Appertaining to a Vi'rapping Machine; and I do hereby declare the following to be a full, clear,

and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to a n'iachine for foldlng Wrapper sheets or cartons around articles as they are successively passed through the. machine..

The primary object of the invention is the provision of a machine of this class which is automatically operable in a rapid and efiicient manner to place or fold wrappers or cartons about articles, and particularly about cakes or bricks of material of a soft or semi-plastic nature, such for instance as butter and ice-cream, Without destroying and changing the molded shape of the articles.

A further object of the invention is the provision of a machine of the character dey scribed which is successively and automatr f cally operable to fold a tissue or thin wrapper sheet aroundbricks of butter or other material of a se1ni-plastic nat-ure and then fold a carton member around the wrapped brick and tuck in its end flaps.

The invention is fully described in the following specification, and while, in its broader aspect, it is capable of embodiment in numerous forms, a preferred embodiment thereof isillustrated in the accompanying drawings, in which.-

Figure 1 is a side elevation of the thin sheet wrapping unit of the machine. Fig. 2 is an enlarged top plan view thereof with parts removed and parts broken away. Fig. 3 is a rear end elevation thereof with parts broken away and removed. Figs. 4. 5 and 6 are enlarged sections taken respectively on the lines 4-4, 5-5 and 6-6 in Fig. 1, with parts in Fig. 5 broken away. Fig. 7 is an enlarged fragmentary Lsection on the line 7--7 in Fig. 1. Fig. 8 is an enlarged frag- .mentary section taken on the line 8 in Fig.-

yaway and removed.

1. Fig. 9 is a 'fragmentary sect-ion on the line 9-9 in Fig. 2. Fig. 9^ is a fragmentary detail of a portion of the thin wrapper sheet feeding means. Fig. 10 is a perspective view illustrating the relation of a brick of material to a wrapper sheet when moved into. engagement therewith. Fig. 11 is a perspective View of a brick and wrapper sheet illustrating the first folding operation. Fig. 12 is a similar viewillustrating the second and third folding operations, which lap the projecting side edges of the sheet. F ig.' 13 is a perspective fragmentary view illustrating the first end folding operation.

Fig. 14 is a similar View illustrating the second end folding operation. Fig. 15 is aperspective fragmentary View of the end folding means for the wrapper sheets, with parts broken away. Fig. 16.is an enlarged central vertical longitudinal section illustrating the brick feeding means and with parts broken Fig. 17 is an enlarged fragmentary vertical longitudinal section of a portion of the brick feeding means which Vmoves the bricks from the first folding to the second folding position. Fig. 18 is a perspective detail of a portion of the brick feeding means. Fig. 19 is a side elevation of the carton wrapping unit of the machine. Fig. 19A is a fragmentary rear elevation thereof illust-rating the feed roli driving means. Fig. 20 is an enlarged fragmentary perspective view of a ortion thereof with parts broken away. Fig. 20A is a fragmentary cross-section on the line 20A-20A in Fig. 19. Fig. 21 is a fragmentary longitudinal vertical section of the carton sheet feeding means and a portion of the carton folding mechanism. Fig. 21A is a fragmentary view of the carton sheet'feeding means. Fig. 21B is a fragmentary perspective view1 of a portion of the carton feeding. wheel.

Fig. 22 is aperspective view of an article4 being inserted into the carton. Fig. 26 is a cross-section on the line 26 in Fig. 25, and Fig. 27 is a fragmentary top plan view oi the carton eedin means.

Referring to t e drawings, 1 designates the frame of the thin sheet wrapping unit, hiaving the longitudinally extending top side bars 2, and 3 the frame of the carton wrapping unit which has the longitudinally extending top side bars 4 on a levely with and substantially longitudinally aligned with the top bars 2 of the first unit. A table or platform 5 is rovided at the upper rear end portion of t e frame 1 between the sides 2, and the bricks or articles a to be wrapped are placed on this table either by hand or may be automatically fed thereto from a brick molding unit which in practice is used in connection with the machine and successively forms butter, or other material of a semiplastic nature, in brick form and feeds the bricks forward onto the table 5 in position to be advanced through the wrapping machine by the feeding means'hereinafter described The table 5 terminates at its forward end adjacent to the rear end of the frame unit l and the bricks continue their moi-ement through the wrapping machine on tnnsversely spaced track bars 6. These truc.' by t llc bracket arms 7 projecting inward from the side bars 2.

Two shafts 8 and 9 are journaled in transversely spaced relation in the two frames 1 and 3 and extend the entire length thereof. These shafts are connected at one end by a train of gears 1() to cause them to rotate inK unison and, in the present instance, at the same speed. The shaft 8, in the present instance, is in bevel-gcared connection 11 with a vertical shaft 12 (Figs. 1 and (i) which shaft is carried by a bracket 13 at a side of the frame 1 and is inA bevel-geared connection 14 at its lower end with a crosssha t 15 journaled crosswise in the frame 1. The shaft 15 is in turn in bevel-geared connection 1G with a drive shaft y17 disposed at one side of the frame lengthwise thereof. A hand operating wheel 18 (Fig. 1) is mounted on a stub shaft projecting from the frame 1 and has a small pinion in mesh with a large pinion 19 on the shaft 15.

Thin steet folding 'un-it.

A feed-slide 2O is mounted in the upper portion of the frame l for longitudinal reciprocatory movements in a horizontal plane below the track-bars 6 and has its movements guided by bearing brackets 21 projecting inward from the frame side bars (l fi, 5 and 6). Theslide 20 is connected cy a link 22 to the upper end of a lever 23. which is pivoted below the countershaft l5 at 2d and is rovided abovesuch pivot with a yoke 25, weich embraces a camn hars are mounted on and supported wheel 26 on the shaft, whereby a rotation of the cam-wheel imparts predetermined rocking movements to the leve-r. It is thus evident that at each revolution of the cam 26 the feed-slide has a forward and rearward stroke A of predetermined length imparted thereto.

A rod 27 projects rearward from one side of the feed-slide 2O near its rear endand the rear end portion ot such rod is elevatednbove .the plane of the table 5 at one side thereof and has a brick or article feeding arm 29V projecting transversely therefrom and adapted, during each forward stroke thereof, to engage a brick a previously placed on the table 5, and move it to the position A (Fig. 16) in the machine, l

An arm 31 (Fig. 17) projects upward and outward from the rear end of the feedslide 20 and has an elbow-lever 32 pivoted to and projecting rearwardly therefrom above the plane of the track-bars 6, with its forearm portion 32? projecting over the trackv bars 6 crosswise thereof in position to engage back of an article a and move it a distance forward over the trackbars when the feedslidc 2O is reciprocated. The lever 32 is provided at its elbow with a roller 33, which rests on a bar 34 for horizontal movements thercover, and when the lever 32 has been moved rearward a predetermined extent, the roller 33 passes up a pivoted inclined finger to an elevated horizontally disposed bar 36. The movement of the roller up the inoline 35 and onto the bar 36 effects a raising of the forearm portion 32Il of the lever snfliciently to pass rearwardly over the top of the brick a., which has been positioned at a side of the bar 36 by the preceding forward movement of thearm 29. As the roller 33 passes from the' rear end of the bar 36 at the rear cnd ot its stroke. the lever drops down until its roller strikes the bar 34 thereby placing the fore-arm 32 of the lever in the rear of the adjacent brick fr in position to engage and push the same forward at the return or forward stroke of the feed-slide. The inclined linger 35 is pivotcd to the bar 36 to permit the roll 33 on its forward movement to raise and pass under the salue. The lever 32 moves an engaged brick a forward to the second position of thc brick in the machine, which position is designated B (Fig. 16).

The feed-slide 2O has, in the present instance, three pusher-fingers 37, 38 and 39', of bellcrankdever form pivoted thereto and adapted to have successive`pushing engagement with a brick a in its movement over thetrack-bars 6 as the slide 2O is reciprocated Each pusheninger is normally held 1n upright operative position by a respective spring 40, which connects the .same to the slide 2O and is permitted to swing forward against the tension of its spring when it passes under a brick a during a retracting movement of the slide, as is evident by reference to Fig. 16.

vversely spaced relation and has an adjustably inclined wrapper sheet supporting table 45 therebetween. lThe arms 42 are braced at their underside by bars 46, which extend therefrom down to and connect 'with th standards 41. A bar 47 connects the two arms 42 below the forward end portion of the table `45 and has a plurality of fingers 48 adjustably projecting forward therefrom slightly in advance of thefforward end of` the table and in supporting relation there to as shown in Fig. 9. A plurality of sheet feeding rolls 49 are mounted on a shaft 50 with their rear portions in oveihanging relation to the forward end of the feed-table and each provided on a portion of its periphery with a friction feed strip or surface- 51 of rubber or other suitable material. The wrapper sheets 52, which are placed in a pile on the top of an inclined table 45, are positioned with the forward edge of each sheet disposed slightly to the rear of the. next subjaceiit sheet and at each revolution of thev feed wheels 49 the friction strips 51 are intended to engage the exposed forward end portion ofthe lowermost sheet in the pile and draw it forward from underI the pile, such feeding movement of the sheet being continued until the sheet has been advanced a distance over a lower set of feed rolls 53 and between them and an 'upper tion of the sheet substantially in position to be engaged by the brick a disposed at the rear 'thereof when such brick "is moved forward. The friction strips 51 also coact with the wheels 55 to assist in the sheet feeding movement.

The sets of wheels and 54 are respectively mounted on cross shafts 58 and 59 and a set of guide wheels 6() is mounted on a cross shaft 61 in advance of the wheels 53 and assists in guiding the sheets intol the edge guides 55. The shafts 50, 5S, 5S) and 61 ai'e journaled at their ends in the stand-V ards 41. The wheels 53 are provided with yperipheral recesses (l2, which when in register with the feed strips 51 and coacting feed rolls 54 release the feeding action of the rolls. on the sheet.

A shaft 63 is journaled in one side of the frame, being in beveledgear connection with the shaft'l), and has a chain and sprocket wheel connection 64 with the shaft. 58, the sprocket` member of which mounted on the shaft 58, is loose thereon and connected thereto by a shiftable clutoli collar 65 that is feathered on the shaft. A shipper arm 66 engages the clutch collar and is'carried by a control bar 67, which is mounted for reciprocatory movements transversely of the machine. The shaft 58 is in vs'uitable geared connection with the shafts 50, 59 and 61 to impart the requisite driving movements thereto.

The lower guide frame 56 for the sheet 52 preferably has its side or upright. portions connected by a channeled cross-bar portion so that the frame is of U-foim. It vis preferable to mount the frame 56 for limited vertical movements so that .it may be moved up to meet the sheet 52 in its downward feeding movement substantially at thetime the upper edge of the sheet is released by the coacting feeding rolls, and

the frame 56 then lowers tlied'esired extent thereby. For this purpose the frame 5G4 is guided for limited vertical movements by an arm 568l projecting from an adjacent part of the frame 1 and a lever GS 1s pivoted at one end to the inner end portion of said bracket for vertical rocking move.-v

ments relative thereto and has its free end pivotally'connected to the lower end portion of the -fraine 5G, as shown in Fig. S. A rod 68 projects down from the lever (SS intermediate its ends and carries a -fork 68" at its lower end for st-raddling the shaft 8.l This fork carries a roller 68C be` low the shaft which is engaged by a cam (58l on 4the shaft whereby a positive downward stroke is imparted to the frame 5G at each revolution of the cam. A coiled contractile springr 68e connects the fork 68 to a` superposed portion of the frame 1 'to yieldingly retain the roller GSC in coacion with the cam.

Then a brick a is moved b v the feed lever S2 from its position A at the rear the table opening 57 to its position ll advance of saidopening, the from .side of the brick engages a sheet 52. disposed iii the guides 55 and 5G, substantiallv interinodiate its ends' and causes a foldingof the sheet in reclined U-shapc about the brick,

connection, A

due to the sheet being carried with the brick to its position B and having its projected ends respectively folded under and over the brick by the coaction therewith of a pair of rollers 69. @ne ofthese rollers is carried by the track bars 6 at their rear ends and the other is carried by a pair of arms projecting rearward from a frame yoke 71, which projects over the trackbars and is mounted on its ends on the respective frame bars 2. e

A finger 72 is pivotally suspended from between the arms 70 at the rear of the upper Aroll 69 and is acted on by a spring 73 to cause it to press against the central ortion of the sheet 52 and hold it to the rick a during a predetermined advancing movement of the brick.

A brick a; and its wrapper sheet, when moved to position B, are disposed below the yoke 71, and a yielding pressure plate 74, which is carried at the under side of the yoke for yielding vertical movements, coacts lightly with the upper side of the brick to hold the upper rearwardly bent portion of the wrapper sheet against the brick. A slide 75 (Figs. 2, 4; and 9) is mounted Vfor vertical sliding movements in guides provided at the rear side of the yoke 71 and this slide has a fork 76 pivoted to its lower end for swinging movements longitudinally of the machine and carrying a roller 77. Upon a lowering of the slide-75 the roller 77 passes a short distance down at the rear side of the brick a. and causes a folding of the upper projecting kedge portion of the wrapper sheet down against the rear side of the brick, as best shown in Fig. 9. A spring 78 is carried by the slide 75 and bears against the fork 7 fi to vieldingly hold the roller against the brick. functions as a yieldable tip on the lower end of the slide. A. lever 79 is fulcrumed to one sido of the slide guiding portion of the yoke 71 and has one end connected to the slide 75 to impart reciprocatory movements to the slide when the lever is rocked. rlhe other end of the lever has a rod 80 extending down. therefrom and provided at its lower end with a fork 81, which straddles the shaft S. This fork carries a roller` 82 on the shaft S whereby at each revolution of the cani a predetermined lowering and raisingmovement is imparted to the slide 75. A coiled contractile spring 84 connects the rod 8 to a subjacent part of the frame 1 and yieldingly holds the roller 82 to the cam.

When the feed slide 2O is at the limit of its rearward movement, as shown by its dotted line position in Fig. 1G, the rear pusher-finger 37 is disposed in forwardly inclined position under the rearwardly projectinglower edge portion of the wrapper sheet 52 of the brick when in its position B,

The fork thus being held in such inclined position by a stop 85 between the track-bars 6, with which it engages. As the feed-slide 20 moves forward the finger 37 straightens up and raises the lower rear fla portion of the wrapper sheet 52 therewit i, and then, durin the continued forward movement of the iger, forces said portion of the sheet up against the rear side of the brick in lapping relation to the upper rear edge portion of the wrapper, the xfolding of which against the brick precedes that of the lower edge ortion. The` brick and wrapper are fe 'to the position B in the relation shown in Fig. 11, and the rear edge ortions of the wrapper are folded nwar in lapping relation, as shown in Fig. 12, when the brick is in its position B. lIt will be understood that 'when the finger 37 is in position to engage the brick L disposed below the yoke 71 the member 32 will be in position to engage the next brick a at the rear which is disposed in its first position at the return of a fed wrapper sheet 52, as shown in Fig. 9.

As the feed slide 20 continues its forward movement after the finger 37 has folded the lower rear wrapper edge against the brick, the brick and its wrapper are moved forward under a vertically yielding pressure strip 86, a'nd stop in their third position, or position C, under the rear edge of such strip, as indicated in Figs. 1 and 13. The pressure strip 86 extends for a considerable distance over the `track bars 6 lengthwise thereof and is suspendedfor vertical movements from bracket arms 87 attached to one of the frame bars 2. Coiled compression springsl88 are disposed between the pressure strip and bracket arms to yieldingly resist a raising of the pressure strip. `When a brick has been moved to this C position, a pivotally mounted forked member 89 is swung downward and forward from its raised position shown in Fig. 15. This member has fingers 9() pivoted to and projecting forward from its fork arms in position to pass forward at the ends of the brick in lapping relation thereto when the member 89 is swung down, and to engage and cause the rear projecting end portions of the wrapper sheet to be folded forward against the ends of the brick between the upper and lower projecting end portions of.

the wrapper, as shown inFig. 13. The fin gers 90 are mounted for yielding outward swinging movements from the normal pesition shown in Fig. 15, being normally held in such position by coiled springs encircling headed pins 91, which project loosely through the inner end portions of the fingers from res ective portions of the member 89. The ngers 90 have anges 92 projecting .inward therefrom for stop engagement with the rear edge of a brick, as shown.

The member 89 is carried by ashaft 93y l member.

{Fig 5), which is journaled in a bearing arm 94 projecting from one of the frame bars 2, and this shaft has a rocker-arm 95 at one end. A rod 96 projects down -trom this roclmf-arm and is provided at its lower end with a fork 97 which straddles the shaft 9 and carries a roller 98, which rides on a cam 99 on said shaft. It is thus evident that at each revolution of the cam 99 a predetermined rocking movement is imparted to the rocker member 89. A coiled contractile spring 100 connects the rod 96 to a subjacent portion of the frame 1 and yieldingly holds the roller 98 on its cam.

5 During the folding operation of the member 89 the feed-slide 20 is retracted to place vthe pusher finger 38 at the rear of the brick, and during the next forward stroke of the feed slide the brick is moved forward under the pressure strip 86 to its fourth or D position, in which position it is still disposeid under the pressure strip. During the initial portion of this movement of the brick the ends of the brick pass by end folding members 101, which engage the forward projecting end portions of the wrapper sheet and cause an inward folding of such portions between the upper and lower end flap portions of the sheet and over the previously foldedV rear end portions of the sheet, as shown in Figs. 14 and 15. The members 101 are carried by stems 102, one of which is mounted for yielding outward movements in the rear bracket arm 87, While the other is mounted for yielding outward movement in a bracket arm 103 fixed to the adjacent frame bar 2. A coiled contractile spring 10-1- (Fig. 7) is mounted in each stem bearing in encircling relation thereto and coacts with the stem and bearing ina manner to resist an outward movement of the folding The upper and lower edges of the folding member are preferably turned outward as shown. Upper and lower flange strips 105 and 106 project respectively from the side edges of the. pressure strip 86 at the rear end portion thereof and from the outer edges ot the track bars 6 above and below the end foldingmembers 101 in vertically spaced relation thereto. The upper flanges 105, immediately in advance o-c the members 101, are formed with downwardly v*and inwardly extending wrapper folding portions .107, which coact with the upper projecting end portions of the wrapper sheet and turn them down and inward against the previously folded front and rear end portions of the sheet as the brick is moved forward. The

' upward and inward in lapping relation over the respective upper folded Aportions of the wrapper sheet. This completes the folding operation of the wrapper sheet.

Yielding side pressure plates 109 are disposed at the sides of the brick runways immediately in advance of the side folding flanges 10T and 108 in position to engage the folded en'd portions of a wrapper sheetv and hold them closely to the ends of the brick in such position. The members 109 also eX- tend a distance forward from position D to hold the end portions of the wrapper sheet in closely folded relation during a predetermined portion of the forward feeding movement of the brick after leaving the position D.

Each plate 109 preferably has its rear end turned slightly outward and is carried by a stem member 110, which is mounted for reeiprocatory movements transversely of the frame in a guide 111 carried by the adjacent frame side bar 2. A coiled compression spring 112 coacts with the stem 110 to yield.- ingly resist an outward movement thereof.

The next forward movement'of the feedslide 20 causes the forward pusher finger 39 thereof to engage a wrapped brick disposed in the position D and to move it to the first position in the carton wrapping unit, the frames 1 and 3 of the two units being in close end abutment for such purpose, and the forward ends of the track-bars 6 meeting the rear end of a table 119 on the rear end portion of the frame 3.

Uafrton folding mit.

Two standards 120 (Fig. 19) rise from the rear end portion of the frame 3, one from each side bar 4 thereof, and an `in elined carton holding table 121 is supported in elevated position at the rear of these standards bysupports 122 rising therefrom. A shaft 123 is journaled in the standards 120 below the front edge of the tablev121 and carries a plurality of feed wheels `124: below the forward edge of the table. Each of these wheels is provided at a point on its periphery with one or more radially projecting pins 125 (Fig. 21B), which, vas they pass under the forward edge ofthe table in each revolution of the WheeLengage the lowermost carton 126 of the pile disposed on the table and draw it forward from the pile. The forward movement of the remaining cartons of the'pile' is prevented by a plurality of fingers 127, which extend downward and forward from a shaft 128 carried by the upper portion of the table as shown in Fig. 21. An upper `set `of wheels 129, which are mounted onthe shaft 130, coact with the wheels 124 to feed the carton forward and downward in advance of a wrapped briokldisposed on the table 119 and through an opening 131 provided between the forward end of the table 119 lll) and the pair of vtrack bars 132, which extend lengthwise of the frame the -same as the track bars 6 of the sheet wrapping n'mt.

A. portion of the periphery of the wheel 124 in advance of the pins 125 is cut away, as shown at 133, to release the feeding coaction of the wheels 129 with the wheels 124 the shaft 9 by a clutch controlled driving connection, as shown in Fig. 19A, which connection is similar to that between the shaft 9 and the thin wrapper sheet feeding means in Fig. 3. l"

The cartons are of the usual form, being provided with a central panel f, a top panel g withan edge flap- It at its outer side edge, and a bottom panel z' with a iront panel y' attached to its outer edge. The front panel j has the opposite end flaps c and Z, the panel i has an outer end closing flapn at its right end with a tongue 'm attached to its outer edge. The panel f has flaps o at its opposite ends, and the panel g has an outer end closing flap p at its left end with a tongue g at its outer end.

When a carton 126 has been fed to brick engaging position, as shown in Figs. 21 and 22, its center panel f is disposed in register withy the wrapped brick designated b, which is disposed on the table 1 19, and the carton is sup orted in this position by the end closing ap fm. resting at its outer end in the bottom of a U-shaped guide meinber 136` disposed below the table opening 131 at one end thereof. Theother en Hap p of the carton restsrat its loweredge on a support 137 (Fig. 22) provided` on the top of the elbow lever 138, which performs the same function with respect to the wrapped brick as Vdocs the elbow lever 32 of the sheet wrapping unit with respect to the unwrapped brick. A feed slide 139 corresponding to the feed slide 20 of the wrapper unit is mounted in the upper portion of the frame 3 below the track bars 132, for reciprocatory movements longitudinally therco, and has an outwardly and upwardly projecting arm 140 at its rear end to vwhich the lever 138 is pivoted. This lever projects rearward from the arm 140 and is of an led or L- form and has a roller 141 at its el w which travels on a track bar 142. At a predetermined point in a rearward movement of the lever 138 it asses up an i Aclined finger 143, which is pivoted` to the forward end of an elevated track bar portion 144. The rearward movementl of the lever 138 is sui licient for it to pass beyond the rear end of the elevated track portion 144 so that it is permitted to drop at the rear of a wrapped brick b, which is disposed immediately at the rear of a fed carton sheet 126 by the bracing movement of the pusher finger 39. Upon the forward stroke of the lever 138 its laterally projecting arm por tion engages the wrapped brick b and moves forces the carton forward, the carton passesbetween the upper and lower folding rolls Sil 146 and 147 (Fig. 21) and these rolls cause i a folding of the panels of the carton which are above and below the center panel f respectively over and under the brick. The roll 146 is carried by arms 148 projecting rearward from the frame yoke and the roll 147 is disposed at the forward side of the table opening 131, being journaled in the rear ends of the track bars 132.

' The brick and carton sheet as they passander the yoke 145 have engagement at their top sides with a pressure strip .148 which extends from a point under the yoke to the rear end portion of the frame sothat the brick and carton in their continued Inovement through the machine Jfor the subsequent carton folding operations is held to the track bars 132 by such strip. The strip is pivotally suspended at its forward end from a shaft 149, which is mounted in a bearing bracket 150 rising from one sidebar 4 of the machine frame at the forward end por tion thereof. The strip 148 at its rear end is yieldingly suspended from the yoke 145 by a bolt member 151. A coiled compression spring 152 is disposed on the bolt between the strip 148 and ,upperportion or the yoke to resist an upward movement ci the strip.

When the brick is in position under the lyoke 145, the` anel f of the carton is held closely thereto y a finger 153, which is carried by a .shaft 154 mounted cross-wise of the machine in bearings provided at the up per rear portion of the yoke 145. A rod 155 projects down from a rocker arm 156 on said shaft and is provided at' its lower end with a fork 157, which straddles the shaft 8` and carries a roller 158 that rides on the top of a cam 159 on the shaft 8. A spring 160 acts on thefork 157 to hold its roller to the cam.

The upper edge flap h of the carton is next folded down against the rear side of the brick by the action of a gate 161, which is hinged to the rear side of the yoke 145 above the brick for vertical swinging move- 

